Adjustable strut with toggle action.



G. KELLER.

ADJUSTABLE STRUT WITH TOGGLE ACTION. APPLIoATroN FILED Dno.2z,1soe.

PATENTED JUNE 4, 1907,.

2 SHEETS-SHEET 1.

PATENTBD JUNE 4, 1907.

G. KELLER.

ADJUSTABLE STRU'I WITH TOGGLE ACTION.

APPLIUATION FILED DBO. 22, 1908.

'FgJ. jgji.

y2 sums-SHEET 2.

` NITED sTATEs PATENT oEEicE.

GUSTAV KELLER, or EisENAoacERMANY. i

4Meeus-nietssTnuT wiTi-l roes-LE ACTION.

Specication of Letters Patent.

Patented June4, 1907.

Application sied Dcember 22,1906. serial 110.349.160.

To all whom it ,may concern:

Be it known vthatv I, GUsTAv KELLER, manager, a subject of the Duke ofSaxe- Meiningen, residing at Eisenach, `Grand Duchy ofSaxe-Weimar-Eisenach, German Empire, have invented certain new anduseful improvements in or relating to adjustable struts withl toggleaction suitable for use in all deep level excavations, more particularlyfor pits, shafts, and wells, of which the following is a specification.

My invention relates to improvements in or relating to adjustable strutswith'toggle action suitable for use in all deep level excavations, moreparticularly for pits, shafts and wells.

Supports with toggle action are already well known in mining.

It is also no longer .new to use spreading leverswith toggle action forjoining separate rail sections on' portable railways. Thesewell knownstay and spreading lever devices, however, are not adjustable to theextent absolutely necessary for struts for all deep-level excavations,inore particularlyfor pits, shafts and wells, the so-called canalstruts.

The object of the present invention is to produce a canal strut which isadjustable within as wide limits as possible, which can be extended toany desired extent by securing several strut-bars together, and can beplaced with one push into the spread-out position, and just as quickly,and without any danger, again detached after the vsecuring device liasbeen shifted.

Canal struts" as heretofore known, do

noty have the above mentioned advantages,

as they are adjustable merely by means of a spindle withv a right andleft-hand screw thread. Canal struts of such construction cannot besecured or detached again from the top by meansof a suitable tool.

This is, however, rendered possible by the canal strut according to thepresent invention 3 it is, therefore, unnecessary, as wi th the knownstruts with screw action, to have a irin stand when it is desired to putthe strut in, which is an important advantage, for in g i one isprovided with a series of holes 6, while the shorter one has two holes 7and 12 and most cases it is impossible to get such a stand, moreparticularly in canal building.

But if there be no secure stand when well i known screw struts are putin, then the putting in and the detaching of the struts is exl i i it isconstituted by two or more bars of any desired cross section hingedtogether in a detachable manner by means of pins or the like, and 1nsuch way that their len th is adjustable Within the widest possib elimits, the strut bars being secured in the operative position by meansof an adjustable collar or ring; the adjustment of the length iseffected by means of holes arranged at certain intervals.

Several constructions of canal struts" ac cording to the presentinvention are illustrated by way of example, in the accompanyingdrawings.

One construction is shown in Figure 1 in elevation, the strut beingshown placed between the canal boards without being tightened. Fig. 2shows the strut in elevation, in stretched position. Fig. 3 is acorresponding plan, and Fig. 4 a cross-section on the line A-B. Fig. 5is a perspective view of a canal strut with the bars arranged to form ashort length, for use when the canal-boards are at a small distance fromeach other. While in the construction shown in Figs. 1 to 5 the strutsare made of two U-shaped bars, the construction shown in Fig.. 6intended forv smaller canals and easily constructed, comprises avT-shaped bar and two angle irons with their wider webs secured togetherby means of a flat iron bar placed between them. Figs. 7 and 8 show twoother constructions of canalstruts made of U-iron. Fig. 9 is a detail ofthe canal strut shown in Fig. 8. Fig. 1() is a section on the line C-Dthrough the canal'strut shown in Fig. 11, and constituted by a squarebeam and a U- iron. The strut shown in Fig. 1.2 is constituted by around wooden beam and a U-iron. Fig. 13'is. a detail, while Figs. 14 to18 are sections on the line E-F of different constructional forms of thestrut shown in Fig. 12.'

The strut bars 1 and 2 at their ends adjacent to the canal boards 3 and4 are provided either direct with claws 5a or with shoes 5 having suchclaws. The bars 1 and 2 are preferably of unequal length, and thelonger- IIO f xo means of a cable or chain attached near the pin 8, thecanal strut can be brought into the position shown in Figs. 1 and 5,from thecanal top that is to say rpm outside the canal itself, and thusremoved'ln a very convenient 4waly and'withoutany danger.

used, one bar 1 is cut out at the hinge end, so that the central web isremoved. Owing t0 the shorter bar 1 being provided with two holes-7 thestrut can be more easily lengthened and shortened within narrow limitsthan if the bar 1 were provided with only one hole', l Y

In the event of the' canal strut being still insufficiently long whenthe boards 3 and 4 to be stayed are at a great distance a art, severalbars 1 and 2` can be connecte together into one single strut by means ofpins 8 as shown in Fig. 7.

The two outer strut bars 1a and 2b could also A be utili'zedas canalboards, while the bars 1 and 2a and 2 and 1b form a rigid strut, beingconnected by means of the pin 8, an'd the ring Q ushedover them.v Inthis vway any desire nuniber of bars 1 and'2 can' be c onvnected to formone single strut, and thus, as the single bars 1 and 2 can be adjustedrelatively to' each other, the strut can be adjusted to suit any desiredWidth pf canal.

` In the construction of the canal strut made of two U-irons 1 and 2, asshown in Fig.- .8, in order to secure the..,strut inthe stretched po.-

sition without the use of a ring 9, the pivoted. end of the U-iron isslightly bent upward and provided with a stop pm 14, so that the strut.

cannot sink downward beyond the stretched 4position after the stop pin-14 has mme to rest i against the bar 2. f

In order to make the strut adhere properly to the canal boards, the freeends of the bars 1 and2 ma be provided, as shown clearly in Fig. 9, Witdetachable shoes 15. yfitting each end of the bar, made of angle iron,secured by means of bent l 16 by screws or the like, and provided witpoints 17.

In the construction shown in 11 and 12, one ofthe bars is constituted bya wooden beam of s uare or round cross-section, while the secon bar 2 isconstituted by a U'iron.

6o The beams 1 are preferably provided witha head piece 18 made ofU-iron, as shown m4 Fig. 13, of which the upwardly bent flap A19 restsagainst the head of the beam and thus receives the pressure of thestretched strut. 6 5 The head piece 18 is secured to the wooden thecanalA vtogether, one -ofsaid bars having' a series of esente beam bybolts 23 and pivoted to the U-iron 2 by means of a pin 8. f To that end,the head piece -18 is provided with several holes 7 arranged closetogether, enabling the strut to -be lengthened and shortenedkw1thinnarrow 7o f When square beamsare used as shown in Fig. 11, thevU-iron 2 preferably overlaps the head'piece 18 as shown in the crosssection in Fig. 10. -A cranked head iece (Fig. 17) 75 withthe -Ubar 2arra d insi e may equally well be employed. en round wooden beamsare'used, as shown in' Fig. 12,' the U11 i iron 2 ispreferably .arrangedbetween the side webs of the head piece 18 as shown in Figs. 8o 1g.5clearly shows that when U-irons' are 14 to 18 which vrepresent variousconstruetions shown in cross section on the line E-F. In theconstruction shown in Fig. 14 the' head piece is'constituted by a pipeof which one end 20 is pushed over the round beam 15 85 I and secured bymeans of bolts 23, while lthe othenend vis slit lon 'tudinal1y The lugs21 thus produced, are ent upward and pivoted by pins 8 to the U-iron 2.

The spread -out position of these canal 9o struts may be Secured bypushing the ring 9 over the two bars, or by means of. a second boltintroduced into the holes 7. .'In order to prevent the rings fromgettinglost, the bars ma be provided at suitable points with stops w ch 1n thecase of U-lrons, have the shape of projections, rivet heads or thelike.

In the constructions .shown in cross section in Figs. 15 to 18, theshape ofthe head piece '18 is practicallythe same as in Fig'..1 3 In m:Fig. 15, in order to afford a firm support to the U-iron '2 in stretchedosition,1t` wo Hatiron strips 22 are arrang at both sides of the beam 1.In Fig. 16 the'U-iron bar 2 is replaced by a bar 25 of arc-shaped crosssection. The firm support for the U-lton 2in stretched position of thestrut vcan also be obtained, as shown in Fig. 17 by bendingthe two sidelugs of the U-iron 18 at 24, so that' theU-iron 2 can rest on the bentportions.v no

ros

'Fig. 18 shows a very simpleconstruction, in

which the U`iron 2 simply rests on the round wooden beam 1. In'theconstructions shown inFigs. 10 to 18, the-bar `2 in stretched positionalwa s comes to rest on the bar 1'. n 5

What claimrisr' 'i 1. An adjustable strut with toggle action, comprising.two oppositely facing yoke formed interitting bars detachably pivotedperforations, andthe other having two lseries of prforations, thedistance between the perforationsV comprising one of the series 'of thelatter bar being one-half. as long as the distance between theperforations `in the former bar, and means for securing the barstogether.

2. Anl adjustable strut with toggle action, comprising twov olppositelyfacing yoke formedinterfttingars detachably pivoted 13o together, one ofsaid-bars having a series of perforations, and the other having twoseries of perforations, the perforations of `one of the latter seriesbeing adapted to registerwith the series of perforations inA the iirstmentioned bar, and means for securing the bars together.

3. An adjustable strut with toggle action,`

' being adapted to register with the series of perforations in the firstmentioned bar, and means for seeming the bars together.

4. An adjustable'strut with toggle action, comprising two oppositelyfacing yoke formed interiitting bars detachably pivoted together', eachof said bars bein provided with means whereby a plurality o bars may beconnected'thereto to form a single rigid bar.

5. An adjustable strut with toggle action, comprising two oppositelyfacing yoke formed interfltting bars detachably pivoted together, eachof said bars being provided with means whereby a plurality of bars maybe connected thereto to form a single rigid bar, one of said bars havinga series of perforations, the other having two: series of perforations,the distance between-the perforations comprising one of the series oithe latter bar being one-half as long as the distance between theperiorations in the former bar.

6. An adjustable strut with toggle action, comprising two o positelyfacing yoke formed interitting ars detachably pivoted together, each ofsaid bars being provided with means whereby a plurality of bars may be'connected thereto to form a single rigid bar, one of said bars havinga' series of perforations and the other having two series ofperforations, the perforations of one of the atter series bein adaptedto register with the series of pe orations in the first mentioned bar. Y

7. An adjustable s trut withtoggle action, comprising two o positelyfacing yoke formed intertting liars detachably pivoted together, each ofsaid bars beinvprovided with means whereby a plurality o? bars may beconnected thereto to form a single rigid bar, one of said bars having aseries oi'perforations and the otherhaving 'two series of perforations,each of which is located adjacent the terminals ofthe bar, theperforaengage, one of said bars having a series of' perforationsand. theother having two series oi perforations, the distance between theperforations comprising one of the series of the latter bar beingone-half as long as the distance between the perforations in the iormerbar, each of said bars being provided'with means whereby a plurality ofbars may be connected thereto to form asingle rigid bar.

9. An adjustable strut with toggle action,

comprising two bars detachably pivoted together, the pivoted end of onebar being bent upwardly and lprovided with a stop pin against which. theother bar is adapted to enage, one of said bars having a series ofperorations and the other having two Vseries of erforations, theperforations of one of the atter series bein@ adapted to register withthe series of peribrations in the first mentioned bari each of said barsbeing provided with means whereby a plurality of. bars may be connectedthereto to forma single rigid bar. l v

10. An adjustable strut with toggle action, comprising two barsdetachablyjplvoted together, the pivoted end 'of one bar being bent'upwardly and provided with a stop pin against which the other bar isadapted to engage, one of said bars having a series of perforatlons andthe other having two' series of perforations, each of which is locatedadjacent the terminal of the bar, the perforations of one oi the-latterseries being adapted to register with the series of perforations in thefirst mentioned bar, each of said bars being provided with means wherebya'plurality of ars may be connected thereto tol form a single rigid bar.

comprising two o positely faclng yoke formed interfitting together, andmeans for securing the lbars in their adjusted position.

In testimony whereof I haveher'eunto set my handin presence of' twosubscribing wi tnesses.

GUsTAv KELLER'.

Witnesses: o

CARL VOLL, ERICH STRELow.

ars detachably pivoted l .105 11.' An adjustable strut with toggleaction,

IIO

